Visible dried-in-place non-chrome polyacrylamide based treatment for aluminum

摘要

A method of providing color to a polyacrylamide based, dried- in-place, non-chromate conversion coating is provided. The addition of a phthalo green pigment and optionally a nonionic surfactant to an aqueous, dried- in-place conversion coating treatment solution provides for a colored conversion coating without adversely affecting the corrosion resistance or adhesion properties of the conversion coating.